I just installed windows 7 RC on my laptop.  This is review

Device drivers status

Hardware Working status
Display Working (Auto detected)
Dual Screens Working (Auto detected)
Sound Working (Auto detected)
LAN Broadcom 440x 10/100 Working (Auto detected)
WLAN Broadcom 110 Working (Auto detected)
Bluetooth Not Working by default.

GUI experience

GUI Very good
Speed of OS Very good
Networking Not very impressive
Backward GUI compatibility Bad

Overall rating 7.5/10

First week

1. Installed Software –Visual Studio 2008.
2. Not even single crash.
3. No lags.
4. Lot of Updates :( as this is RC this is acceptable.